<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="open">退出</el-button>
    </el-header>
    <!-- 页面主题区 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <!-- 或者只写unique-opened,不加:表示只是个值-->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" :unique-opened="true" :collapse="isCollapse" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: "iconfont icon-user",
        103: "iconfont icon-tijikongjian",
        101: "iconfont icon-shangpin",
        102: "iconfont icon-danju",
        145: "iconfont icon-baobiao",
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: "",
    };
  },
  created () {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    open () {
      this.$confirm("是否退出?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$message({
            type: "success",
            message: "退出成功!",
          });
          // removeitem("token");只删除一个
          window.sessionStorage.clear();
          // 用replace更好
          this.$router.push("/login");
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消退出",
          });
        });
      // logout() {
      //   // removeitem("token");只删除一个
      //   this.$message.success('退出成功')
      //   window.sessionStorage.clear()
      //   // 用replace更好
      //   this.$router.push('/login')
      // },
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menulist = res.data;
      console.log(res);
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse;
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem("activePath", activePath);
      this.activePath = activePath;
    },
  },
};
</script>

<style lang="scss" scoped>
.home-container {
  height: 100vh;
  .el-header {
    align-items: center;
    padding-left: 0;
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    color: #fff;
    font-size: 20px;
    div {
      align-items: center;
      display: flex;
      span {
        margin-left: 15px;
      }
    }
  }
  .el-aside {
    transition: 500ms;
    background-color: #333744;
    .el-menu {
      transition: 0ms;
      border-right: none;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
  .iconfont {
    margin-right: 10px;
  }
  .toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 20px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
}
</style>
